<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373574</termId><termName>lithium silicate</termName><termType>PT</termType><termNote><![CDATA[ Any of several silicates containing lithium. Used as sealer and hardener in concrete surface treatments. ]]></termNote><termCreatedDate>2026-03-30 20:40:44</termCreatedDate><relation><relationType>UF</relationType><termId>31373575</termId><termName>lithium silicates</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373576</termId><termName>silicate, lithium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343249</termId><termName>silicates</termName><termType>PT</termType></relation></term>  </Zthes>